wasCSharpSQLite – Blame information for rev 1

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1 office 1 # 2007 June 13
2 #
3 # The author disclaims copyright to this source code. In place of
4 # a legal notice, here is a blessing:
5 #
6 # May you do good and not evil.
7 # May you find forgiveness for yourself and forgive others.
8 # May you share freely, never taking more than you give.
9 #
10 #***********************************************************************
11 # This file implements regression tests for SQLite library.
12 #
13 # This file implements tests to verify that ticket #2409 has been
14 # fixed. More specifically, they verify that if SQLite cannot
15 # obtain an EXCLUSIVE lock while trying to spill the cache during
16 # any statement other than a COMMIT, an I/O error is returned instead
17 # of SQLITE_BUSY.
18 #
19 # $Id: tkt2409.test,v 1.6 2008/08/28 17:46:19 drh Exp $
20  
21 # Test Outline:
22 #
23 # tkt-2409-1.*: Cause a cache-spill during an INSERT that is within
24 # a db transaction but does not start a statement transaction.
25 # Verify that the transaction is automatically rolled back
26 # and SQLITE_IOERR_BLOCKED is returned
27 #
28 # UPDATE: As of the pcache modifications, failing to upgrade to
29 # an exclusive lock when attempting a cache-spill is no longer an
30 # error. The pcache module allocates more space and keeps working
31 # in memory if this occurs.
32 #
33 # tkt-2409-2.*: Cause a cache-spill while updating the change-counter
34 # during a database COMMIT. Verify that the transaction is not
35 # rolled back and SQLITE_BUSY is returned.
36 #
37 # tkt-2409-3.*: Similar to 2409-1.*, but using many INSERT statements
38 # within a transaction instead of just one.
39 #
40 # UPDATE: Again, pcache now just keeps working in main memory.
41 #
42 # tkt-2409-4.*: Similar to 2409-1.*, but rig it so that the
43 # INSERT statement starts a statement transaction. Verify that
44 # SQLITE_BUSY is returned and the transaction is not rolled back.
45 #
46 # UPDATE: This time, SQLITE_BUSY is not returned. pcache just uses
47 # more malloc()'d memory.
48 #
49  
50 set testdir [file dirname $argv0]
51 source $testdir/tester.tcl
52  
53 ifcapable !pager_pragmas {
54 finish_test
55 return
56 }
57  
58 sqlite3_extended_result_codes $::DB 1
59  
60 # Aquire a read-lock on the database using handle [db2].
61 #
62 proc read_lock_db {} {
63 if {$::STMT eq ""} {
64 set ::STMT [sqlite3_prepare db2 {SELECT rowid FROM sqlite_master} -1 TAIL]
65 set rc [sqlite3_step $::STMT]
66 if {$rc eq "SQLITE_ERROR"} {
67 unread_lock_db
68 read_lock_db
69 }
70 }
71 }
72  
73 # Release any read-lock obtained using [read_lock_db]
74 #
75 proc unread_lock_db {} {
76 if {$::STMT ne ""} {
77 sqlite3_finalize $::STMT
78 set ::STMT ""
79 }
80 }
81  
82 # Open the db handle used by [read_lock_db].
83 #
84 sqlite3 db2 test.db
85 set ::STMT ""
86  
87 do_test tkt2409-1.1 {
88 execsql {
89 PRAGMA cache_size=10;
90 CREATE TABLE t1(x TEXT UNIQUE NOT NULL, y BLOB);
91 }
92 read_lock_db
93 set ::zShort [string repeat 0123456789 1]
94 set ::zLong [string repeat 0123456789 1500]
95 catchsql {
96 BEGIN;
97 INSERT INTO t1 VALUES($::zShort, $::zLong);
98 }
99 } {0 {}}
100  
101 do_test tkt2409-1.2 {
102 sqlite3_errcode $::DB
103 } {SQLITE_OK}
104  
105 # Check the integrity of the cache.
106 #
107 integrity_check tkt2409-1.3
108  
109 # Check that the transaction was rolled back. Because the INSERT
110 # statement in which the "I/O error" occured did not open a statement
111 # transaction, SQLite had no choice but to roll back the transaction.
112 #
113 do_test tkt2409-1.4 {
114 unread_lock_db
115 catchsql { ROLLBACK }
116 } {0 {}}
117  
118 set ::zShort [string repeat 0123456789 1]
119 set ::zLong [string repeat 0123456789 1500]
120 set ::rc 1
121 for {set iCache 10} {$::rc} {incr iCache} {
122 execsql "PRAGMA cache_size = $iCache"
123 do_test tkt2409-2.1.$iCache {
124 read_lock_db
125 set ::rc [catch {
126 execsql {
127 BEGIN;
128 INSERT INTO t1 VALUES($::zShort, $::zLong);
129 }
130 } msg]
131 expr {($::rc == 1 && $msg eq "disk I/O error") || $::rc == 0}
132 } {1}
133 }
134  
135 do_test tkt2409-2.2 {
136 catchsql {
137 ROLLBACK;
138 BEGIN;
139 INSERT INTO t1 VALUES($::zShort, $::zLong);
140 COMMIT;
141 }
142 } {1 {database is locked}}
143  
144 do_test tkt2409-2.3 {
145 unread_lock_db
146 catchsql {
147 COMMIT;
148 }
149 } {0 {}}
150  
151  
152 do_test tkt2409-3.1 {
153 db close
154 set ::DB [sqlite3 db test.db; sqlite3_connection_pointer db]
155 sqlite3_extended_result_codes $::DB 1
156 execsql {
157 PRAGMA cache_size=10;
158 DELETE FROM t1;
159 }
160 read_lock_db
161 set ::zShort [string repeat 0123456789 1]
162 set ::zLong [string repeat 0123456789 1500]
163 catchsql {
164 BEGIN;
165 INSERT INTO t1 SELECT $::zShort, $::zLong;
166 }
167 } {0 {}}
168  
169 do_test tkt2409-3.2 {
170 sqlite3_errcode $::DB
171 } {SQLITE_OK}
172  
173 # Check the integrity of the cache.
174 #
175 integrity_check tkt2409-3.3
176  
177 # Check that the transaction was rolled back. Because the INSERT
178 # statement in which the "I/O error" occured did not open a statement
179 # transaction, SQLite had no choice but to roll back the transaction.
180 #
181 do_test tkt2409-3.4 {
182 unread_lock_db
183 catchsql { ROLLBACK }
184 } {0 {}}
185 integrity_check tkt2409-3.5
186  
187 expr {srand(1)}
188 do_test tkt2409-4.1 {
189 execsql {
190 PRAGMA cache_size=20;
191 DROP TABLE t1;
192 CREATE TABLE t1 (x TEXT UNIQUE NOT NULL);
193 }
194  
195 unset -nocomplain t1
196 array unset t1
197 set t1(0) 1
198 set sql ""
199 for {set i 0} {$i<5000} {incr i} {
200 set r 0
201 while {[info exists t1($r)]} {
202 set r [expr {int(rand()*1000000000)}]
203 }
204 set t1($r) 1
205 append sql "INSERT INTO t1 VALUES('some-text-$r');"
206 }
207  
208 read_lock_db
209 execsql BEGIN
210 catchsql $sql
211 } {0 {}}
212  
213 do_test tkt2409-4.2 {
214 sqlite3_errcode $::DB
215 } {SQLITE_OK}
216  
217 # Check the integrity of the cache.
218 #
219 integrity_check tkt2409-4.3
220  
221 do_test tkt2409-4.4 {
222 catchsql { ROLLBACK }
223 } {0 {}}
224 integrity_check tkt2409-4.5
225  
226 unread_lock_db
227 db2 close
228 unset -nocomplain t1
229 finish_test